Mixing apparatus



July 28, 1931. H. s. BEERS 1,816,562

uxme APPARATUS .Filed Jan. 10. 19:50 2 Sheets- Sheet 1 f gilNVENTOR I 4 July 28, 1931. H. s. BEERS HIKING APPARATUS Fil ed Jan. 10. 1930 2 Sheets-Sheet I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I u I I u I I n I I u I I l I I a I I I I I I I I I I I I I I I I I I I I I I I I I I u v I f VENTOR BY I A TORNEY Patented July 28, 1931 UNITED STATES PATENT-OFFICE.

HENRY S. IBEERS, OI WESTPORT, CONNECTICUT, ASSIGNOR TO THE TURBO-m CO3- POBATION, OF NEW YORK, N. Y,

A CORPORATION OF NEW YORK miuxmo nrrmrus' Application filed JanuarylO, .1980. Serial Il'o. 419,789.

My invention relates to mixin apparatus of the turbo-impeller type, an especially to an improved construction or arrangement in which the annular flow directing plates are formed or arranged as parts of the'stationary deflector, and co-operate with the rotor or impeller blades to provide the desired annular flow controlling channel or nozzle for the mix.

Heretofore it has been customary to provide the annular flow controlling plates as parts of theimpeller. The invention provides for simplifying and reducing the cost of impeller. construction and reduces the weight of the impeller by incorporating the flow controlling plates in the deflector structure, which is stationary and in which added weight is not objectionable.

The characteristics and advantages of the invention are further sufliciently explained in connection with the following detail description of the accompanying drawings, which show representative embodiments. After considering these examples, skilled persons will' understand that many variations may be made within the scope of the appended claims.

In the drawings:

Fig. 1 is a top plan of essential parts of a turbo-mechanism of duplex type, embodying the invention in one form.

Fig. 2 is a section in an axial plane.

Fig. 3 is a fragmentary top plan of a mechanism of simplex type.

Fig. 4 is an axial section of the same.

Fig. 5 is a top plan on reduced scale showing a modified impeller blade form or arrangement. t

Fig. 6 is a fragmentary section in an "axial plane showing the blade arrangement of Fig. 5 as embodied in an impeller of simplex type.

In Figs. land 2 I show a mlxer of what is known as duplex type, providing for 1ntake of the mix in both directions, that is,

' from both sides, to the impeller and subforolightness, and which is extended to' form a clrcular flange or plate 3 carrying the vertical impelling blades 4, which may be cast integral with or secured to the hub and plate structure. In this example the 'inward slanting edges 5 of the impeller blades are located substantially outward from the hub; otherwise the blades may extend all the way to the hub andbe connected to or .formed integral therewith, as sufliciently explained below in connection with a modificatlon of the simplex type of impeller, F1gs.-5 and 6.

In any 'case the impeller blades have curvature and arrangement for proper propuls1on of the mix flowing toward the im eller in opposite axial directions, and disc of the mix in tangential directions.

Co-operating with the impeller is a statlonary deflector structure comprising upper and lower blade supporting and flow directing annular plates 6, which are of generally dlshed form, providing entrance or throat port ons 7 and somewhat converging outer portions 8 which conform to the upper and lower edge contours of the impeller blades 4, with slight clearance. These stationaryflow directing plates 6 are designed to provide a substantially annular nozzle co-operating with the impeller blades and of such form that the impelled mixture will flow with maximum velocity to the point of discharge in substantially tangential directions at the outer edges of the impeller blades. (lo-operating with the flow directing plates 7 are vertical deflecting blades 10, curved and arranged as sufficiently shown in Fig. 1 to receive the tangentially moving mixture and direct it to flow outward in radial directions. These deflector blades may be formed integrally with the flow directing plates 6, or

separate and connected to them. When dearge mixture to flow upward and downward and in radial planes.

The impeller is supported and driven by a shaft 15, and in the duplex type where the deflector is located at an intermediate position in the mixing tank and away from the tank bottom .or top, the deflector may be supported in proper relation to the impeller in any convenient way, asby struts 16 extending to the tank side wall.

Figs principle embodied in a mixer of simplex type, that is, one in which the impeller 20 is located close to the tank bottom 21 and material flows into the impeller in only one direction, namely, axially downward. In this simplex type the impeller blades 22 may be connected by intermediate web or plate portions 23 which are of approximate stream line section and located at such an angle that they donot interfere with flow of material. The blades and plates or web members 23 may be connected by spaced arms orspokes '24 to a hub 25 mounted on the driving shaft 26. As a variation, the blades such as 22 of Figs. 3 and 4, may extend all the way to the hub; thus the blades 22 Figs. 5 and 6 may be complete involute blades and the arms or spokes 24 are of course in such case dispensed'with; also in the duplex type, Figs. 1 and 2, the blades may be of complete involute form. extending to a central hub and dispensing with the supporting plate. or septum structure 3 of Fig. 2.

For the slmplex typeof Figs. 3 and 4 the deflector-28 includes a single annular flow directing plate 29 generally similar to the plates 6 of the other example, this plate 29 being suitably dished to provide an entrance throat 30 and aflow space or channel of desired area.

The vertical deflecting blades 31 may be connected to or cast integrally with plate 29, and the entire deflector structure is secured to the tank bottom, as by screws or bolts.

I claim:

1. Mixing apparatus comprising a rotary 3 and 4 shows the same'structural.

bladed impeller including vertical blades of from one another from the ti s of the blades toward theinner ends of the lades; in combination with a stationary deflector comprising twoannular nozzle'forming plates one positioned adjacent the u per edges of the impeller blades and the ot er positioned adjacent the lower edges of the impeller blades, said deflector plates being inclined in conformity with the edges of the impeller. blades and projecting beyond the tips of the impeller blades, and vertical deflecting blades extending'between said plates.

3. A rotary impeller comprising substantially vertical involute blades the upper and lower edges of which are free and diverge from one another from the tips of the blades toward the inner ends of the blades, and annular partition means extending from blade to blade between the upper and lower 1 edges of said blades; in combination with a stationary deflector comprising two annular nozzle forming plates one positioned adjacent the upper edges of the impeller blades and the other positioned adjacent the lower edges of the impeller blades, said deflector plates beinginchned in conformity with the edges of the impeller blades and projecting beyond the tips of the impeller blades, and vertical deflecting blades extending between said plates.

4. Mixing apparatus comprising: a rotary impeller having vertical blades of duplex type; in combination with a stationary deflector comprising two stationary annular nozzle forming plates overlapping the 'im- .100

eller blades, one late being positioned adacent the upper e ges of the impeller blades and'the other being positioned adjacent the lower edges of the impeller blades, said plates also extending beyond the tips of the impeller blades, vertical stationary flow di- I recting blades intermediate and supported by said plates, and additional flow directing blades substantially perpendicular to said stationary vertical blades and supported by said stationary vertical blades.

In testimony whereof I aflix my signature.

HENRY S. BEERS.

duplex type; and a stationary deflector forming in co-operation with the impeller blades an annular flow nozzle, said deflector comprising vertical deflector blades intermedlate and supported by said plates, and additional flow directing blades substantially perpendicular to the deflecting blades and supported by said deflecting blades, said additional blades being inclined alternately at upward and downwardangles to cause the discharged material to flow in corresponding directions in radial planes.

2. A rotary impeller comprising substantially vertical involute blades the upper and 65 lower edges of which are free and diverge 

